Abstract: The object of the invention is a power inverter, the bottom of the housing (1) of the power inverter being configured to be stepped, cooling bodies (10, 11) being disposed on the exterior face of the stepped bottom, at least two printed circuit boards (6, 8) that overlap each other and communicate with the respective one of the cooling bodies (10, 11) through semiconductor components being provided.

Abstract: A method of converting a direct voltage generated by a decentralized power supply system into three-phase alternating voltage by means of a plurality of single-phase inverters (WR1-WR3), said alternating voltage being provided for supplying an electric mains, is intended to avoid inadmissible load unbalances using single-phase inverters. This is achieved in that, upon failure of one inverter (WR1-WR3), an asymmetrical power supply distribution is reduced by limiting the output of the other inverters. The method makes it possible to simplify three-phase voltage monitoring.

Abstract: The subject matter of the invention is an electric coil such as the coil of a choke or of a transformer, said coil comprising at least one connecting member for connection to a printed circuit board, said connecting member (10) being configured to be a contacting dome, said contacting dome (10) comprising at least one cable socket (13), said printed circuit board (20) comprising a bridge (21) that is electrically connected to said printed circuit board (20), said bridge (21) being adapted for electrically conductive connection with the cable socket (13).